well I bought a few (6) ghost shrimp for my new tank and one of em seems to have a huge white nematode in it, is it possible that the other much smaller shrimp have nematodes even if they don't appear (to the naked eye) to have any white worms in them?

Also from having the shrimp in the tank for about an hour, can the nematode spread eggs to other fish and shrimp in this period of time, even though the nematode itself is still in the body of the shrimp?

Also when the nematode does come out of the one shrimp is it possible that the shrimp is carrying eggs of the nematode and it will eventually form another nematode inside again after expelling the last?